8-47882007-G-T

Variant names:

• chr8-47882007-G-T
• rs1554638445
• NM_006904.7:c.4867C>A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_006904.7(PRKDC):​c.4867C>A​(p.Leu1623Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,704 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: PRKDC NM_006904.7 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.32

Genes affected

PRKDC (HGNC:9413): (protein kinase, DNA-activated, catalytic subunit) This gene encodes the catalytic subunit of the DNA-dependent protein kinase (DNA-PK). It functions with the Ku70/Ku80 heterodimer protein in DNA double strand break repair and recombination. The protein encoded is a member of the PI3/PI4-kinase family.[provided by RefSeq, Jul 2010]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PRKDC	NM_006904.7	c.4867C>A	p.Leu1623Met	missense_variant	Exon 37 of 86	ENST00000314191.7	NP_008835.5
PRKDC	NM_001081640.2	c.4867C>A	p.Leu1623Met	missense_variant	Exon 37 of 85		NP_001075109.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PRKDC	ENST00000314191.7	c.4867C>A	p.Leu1623Met	missense_variant	Exon 37 of 86	1	NM_006904.7	ENSP00000313420.3
PRKDC	ENST00000338368.7	c.4867C>A	p.Leu1623Met	missense_variant	Exon 37 of 85	1		ENSP00000345182.4
PRKDC	ENST00000697611.1	n.971C>A		non_coding_transcript_exon_variant	Exon 1 of 2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461704 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727134

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000180

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Severe combined immunodeficiency due to DNA-PKcs deficiency Uncertain:1

Jun 22, 2017

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces leucine with methionine at codon 1623 of the PRKDC protein (p.Leu1623Met). The leucine residue is highly conserved and there is a small physicochemical difference between leucine and methionine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with PRKDC-related disease. Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.20
BayesDel_addAF	Uncertain	0.034	T
BayesDel_noAF	Benign	-0.19
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Benign	0.27	T;.
Eigen	Uncertain	0.23
Eigen_PC	Benign	0.066
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Benign	0.73	T;T
M_CAP	Benign	0.029	D
MetaRNN	Uncertain	0.46	T;T
MetaSVM	Uncertain	-0.19	T
MutationAssessor	Uncertain	2.7	M;M
PrimateAI	Uncertain	0.51	T
REVEL	Uncertain	0.37
Sift4G	Uncertain	0.011	D;D
Polyphen		1.0	D;.
Vest4		0.34
MutPred		0.37		Gain of methylation at K1627 (P = 0.0784);Gain of methylation at K1627 (P = 0.0784);
MVP		0.87
MPC		0.59
ClinPred		0.93	D
GERP RS		2.5
Varity_R		0.18
gMVP		0.31

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs1554638445; hg19: chr8-48794568; COSMIC: COSV58047635;